Cold-iron punch.



N0. 69l,932. Patented Jan. 28, I902 J. C. BURGESS.

CULD IRON PUNCH. (Application filed Lug. 8,1901.)

(I0 Mo vu ga MM? i n I "5' 1A; NTOR:

ATTO NEY NITED STATES PATENT OFFICE.

JAMES C. BURGESS, OF SHERIDAN, INDIANA, ASSIGNOR OF ONE-HALF TO HOWARDI-I. NEWBY, OF SHERIDAN, INDIANA.

COLD-IRON P UNCH.

SPECIFICATION forming part of Letters Patent No. 691,932, dated January28, 1902. Application filed August 8, 1901. Serial No. 71,281. (Nomodel.)

To all whom it may concern.-

Be it known that I, JAMES C. BURGESS, a citizen of the United States,residing at Sheridan, in the county of Hamilton and State of Indiana,have invented certain new and use ful Improvements in Cold-Iron Punches;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

This invention relates to hand-power machines for punching holes incold-iron and other metals, the object of the invention being to providea punching-machine of this character that will be particularly adaptedto supply the needs of small blacksmith-shops, as well as factories,whereby small holes may be quickly punched and the maximum power bequickly obtained for punching large holes, a further object being toprovide a cheap, durable, and economical punch suitable for bench use.

With the above objects in view the invention consists in the novel partsand in the combination and arrangement of parts, as hereinafterparticularly described, and pointed outin the claims forming part ofthis specification.

Referring to the drawings, in which similar reference characters in theseveral figures indicate corresponding parts, Figure l represents a sideelevation of a punching-machine constructed substantially accordingto myinvention; Fig. 2, a central longitudinal vertical sectional view; Fig.3, a detail view of the punch-head and connections substantially on aline 2 2 in Fig. 4, viewed as indicated by the arrows; and Fig. 4, avertical transverse sectional view as on a line 1 1 in Fig. 2.

In construction I provide a suitable frame A, which may be composedeither of castiron or of built-up sections of plate-iron and having aframe head comprising vertical plates B and B, the latter projectingabove and also forward of the former. A suitable guide-channel isjformedin the frame-head between the plates B and B, in which the punchhead 0is mounted, so as to slide therein vertically, the punch-head having asuitable socket in which the punch a may be secured. Any desired numberof punches and dies may be employed, as will be understood, arrangedrelatively according to the usual practice. At the side of the head 0 isan adjustable gib D, engaged by adjusting-screws b,

'fitted into holes in the plate B, and at the front of the head 0 isanother adjustable gib E, engaged by adjusting-screws d, fitted into ablock e, secured between the plates B and B by means of bolts f. Thuslost motion of the punch-head. may be taken up by adjusting thescrews 1) and d.

The head 0 is operated by a pitman F, connected thereto by a pivot-boltg. The upper end of the pitrnan F is provided with a strap G, which,together With the end of the pitman, forms a circular eccentric-strapencircling an eccentric H, having an axle-hole h, through which extendsan axle-bolt 2', that is secured in the plates B and B, the eccentricbeing situate between said plates and provided with a lever I, attachedthereto, Whereby to control and operate the eccentric, and consequentlythe parts connected therewith. The lever I is comparatively short, so asto be easily handled directly for punching small holes quickly, and italso forms part of a compound lever, its extremity having a convexportion j at the upper or rear side thereof. A comparatively large leverJ is pivoted to the plate B by means of a bolt m, inserted in a hole Zabove and forward of the bolt 2'. The lever J has an offset yoke J,through which the free end of the lever I extends, and in the yoke is aroller to operate upon the convex portion J. This leverJ maybequicklydisconnected from the lever I, as will be obvious, by eitherremoving the bolt m or the roller k.

In practical use the levers I and J will stand in substantially verticalpositions, as indicated in dotted lines in Fig. 1, withthe punch up. Topunch a hole, the levers will be drawn forward and downward, thecompound levers being employed for heavy work and the single lever I forlight work, the eccentric providing ample power with a short lever sothat the operator may handle the short lever While at the same timehandling the iron he may be punching, which is a considerable savingoftime.

Having thus described my invention, what I claim is- 1.Inapunching-machine, the combination of the frame, the frame-headcomprising the two plates of which one extends above the other and alsoforwardly toward the front of the machine, the punch-head, the pitman,the eccentric axle-pin in said frame-head, the eccentric on saidaxle-pin, the main eccentriclever having the convex portion at the upperside thereof, the supplemental, lever pivoted to the more elevated oneof said head-plates, and the offset yoke attached rigidly to saidsupplemental lever and engaging said main eccentric-lever, as set forth.

2. In a punching-machine, the combination of the frame, theframe-headcomprising the two plates, the block secured between said twoplates, the punch-head, the adjusting screws in said block, theadjusting-screws in said frame-head, the gibs, the punch, the eccentric,the pitman, and the main eccentriclever, all constructed and arranged asset forth. a

3. In a punching-machine, the combination of the frame, the headcomposed of the longer and the shorter plates, the main lever pivoted tothe shorter plate, the eccentric, the pitman, the punch-head, thesupplemental lever pivoted to said longer plate, the offset yokeattached rigidly to said supplemental lever, and the roller in saidyoke, said main lever extending into said yoke, substantially as setforth.

4. In a punching-machine, the combination of the frame, the frame-headcomposed of the two plates extending forwardly and one extendingupwardly and forwardly from the other, the block between said plates,the punch-head between said plates and said frame and said block, theeccentric pivoted between said plates, the pitman, the main lever, thesupplemental lever, the offset yoke, the roller in said yoke, and theconvex end portion on said main lever extending into said yoke, as shownand described.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES C. BURGESS.

Witnesses:

ALBERT G. PEARSON, JOHN W. KNIGHT.

